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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Practice
{
class Program
{
static void Main(string[] args)
{
Console.Write("Hi, What is your name? ");
string name = Console.ReadLine();
Console.WriteLine("Hi, " + name);


Console.Write("How old are you? ");
int age = Console.ReadLine();
Console.WriteLine("Cool! I am two years older than you. I am " + age + 2 +".");

Console.ReadLine();

What I have tried:

int age = Console.ReadLine();


above^^^ keeps giving me an error message of...

Cannot implicitly convert type 'string' to 'int'


Why?
Posted
Updated 12-Apr-19 10:37am

Well, you found your problem: int age = Console.ReadLine();
If you read the documentation you will see that this returns a string.
Console.ReadLine Method[^]

The cure for this would be to tweak the line and then do some testing.
int age = (int)Console.ReadLine();

Now you should try some text in there and see the exception it throws. Then you tweak it some more and respond appropriately. How-about a TryParse
C#
int age;
string entry = Console.ReadLine();
if (!int.TryParse(entry, out age)) {
  Console.WriteLine("Please enter a number");
} else {
  Console.WriteLine("Cool! I am two years older than you. I am " + age + 2 +".");
}
It's all up to you
   
C# is a strongly typed language. You can not assign a string value to an int variable. You need to CAST (convert data from one type to another) that string to the int value:

https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/types/how-to-convert-a-string-to-a-number
   
v2

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